The Carteira Identidade Nacional app, available on Android, is designed to provide users with a digital representation of their national identity card. This free utility app allows individuals to view all data contained in their physical identity document. A key feature includes the ability to scan QR codes to verify the authenticity of another person's Carteira de Identidade Nacional (CIN), enhancing security for both the individual verifying and the one being identified. This app aims to streamline identity management for citizens while ensuring data protection.

Users are required to have an account with GOV.BR to access all functionalities of the app. It offers offline verification of identity authenticity, provided the identity document complies with the new unified RG model. Additionally, it includes access to a digital identity that is recognized nationwide. The app also features a user tutorial to assist in navigating its various options, making it user-friendly for all citizens.